Provided by: lprng_3.8.B-1_amd64 bug

NAME

       lpd.conf - configuration file for the LPRng line printer spooler system

DESCRIPTION

       The  file  lpd.conf  is  used  to  provide configuration information for the LPRng Printer
       spooler system and defaults  for  printcap  information.   Leading  spaces  on  lines  are
       ignored,  and  blank lines and lines whose first nonblank character is a sharp (``#'') are
       ignored.  Trailing blanks and tabs (whitespace) for an option value are deleted unless the
       last  one  is  escaped  with  a backslash (``\'').  All other lines specify parameters and
       should be of the following form:
              keyword
              keyword@
              keyword#value
              keyword=value
       Note that these values  are  the  same  format  as  printcap(5)  values.   Values  in  the
       configuration  can contain host or machine dependent information; to assist with this, the
       following escape sequences in the configuration information are replaced as follows:

       %h     the short form of the host name (i.e.- non fully qualified).

       %H     the fully qualified host name.

       %a     the abbreviated architecture name, sun4, sol2, hpux, aix, irix5, etc.   This  value
              can be set using the architecture keyword in the configuration file and is set to a
              default value at compile_time.

       %P     the printer name from the printcap entry (see below).

       %R     the remote printer name from the printcap entry.

       %M     the remote host name from the printcap entry.  This is truncated to the short  host
              name.

       For  example,  on  host  dickory.sdsu.edu,  the  strings short=%h long=%H arch=%a would be
       expanded as short=dickory long=dickory.sdsu.edu arch=sun4 .

       The P, R, and M tags are  provided  for  use  with  combined  configuration  and  printcap
       information.   These  values  are  not expanded when the printcap information is initially
       processed, and can be used only  in  a  limited  number  of  printcap  or  other  entries.
       Currently  only  the printcap :sd: (spool directory) and :forward_server: (forward server)
       entries use these.

GENERAL CONFIGURATION PARAMETERS

       Some of the following parameters take lists of files  or  directories.   Unless  otherwise
       explicitly  stated, these lists can be separated by commas (,), semicolons (;), or colons,
       (punctuation) and possibly tabs or spaces (whitespace) as well.

       Keyword names can use either underscores (_) or  hyphens  (-)  in  their  names,  but  the
       underscore is preferred.

       include pathname [pathname*] (no default)
              This  can  be  used  to  include  files  into  the lpd.conf file.  The include file
              parameter a whitespace separated list  of  files;  the  files  must  have  absolute
              pathnames and must be readable.

       ae (default: "jobend $H $n $P $k $b $t")
              This  specifies  either a script or a filter to be invoked at the send of a job for
              accounting purposes.  See  as  for  the  matching  accounting  at  start,  and  the
              printcap(5) and lpd(8) man pages for details.

       allow_getenv (default: "LPD_CONF")
              This  option specifies an environment variable whose value is a configuration file.
              Use of this is restricted to test purposes, and SUID ROOT client  and  server  will
              not run when the variable is enabled.

       ar (default: yes)
              See printcap(5) for details.

       architecture
              The  default  value  is  set  at  compile  time  and  can  be overwritten with this
              parameter.  The default value of this parameter is set at compile time  and  it  is
              used  when  expanding  the  special sequence %a in pathname and filename strings in
              this config file.

       auth (default: NULL)
              Authentication type to be used for client to server communication.

       auth_client_filter (default: NULL)
              Program to be used for client to server communication.

       auth_forward (default: NULL)
              Authentication type to be used for server to server communication.

       auth_forward_filter (default: NULL)
              Program to be used for server to server communication.

       auth_forward_id (default: NULL)
              Authentication id of remote server for server to server communication.

       auth_receive_filter (default: NULL)
              Program to be used by server receive server or client communication.

       auth_server_id (default: NULL)
              Authentication id of originating client or server.

       as (default: "jobstart $H $n $P $k $b $t")
              See as.

       bk (default: no)
              See printcap(5) for details.

       bk_filter_options
              (default: "$P $w $l $x $y $F $c $L $i $J $C $0n $0h $-a") If the  "bkf"  (backwards
              compatible  filter)  flags  is  set  in  the printcap entry and the original filter
              specification does not have a `$` in it, this option string is appended to a filter
              specification,  and  the  string expanded with values from the printcap information
              and job information.  (see  of_filter_options,  filter_options,  bk_filter_options,
              bk_of_filter_options)

       bk_of_filter_options
              (default: "$w $l $x $y") If the "bkf" (backwards compatible filter) flags is set in
              the printcap entry and the original filter specification does not have a `$` in it,
              this  option  string  is  appended  to  the OF filter specification, and the string
              expanded with values from the  printcap  information  and  job  information.   (see
              of_filter_options, filter_options, bk_filter_options, bk_of_filter_options)

       check_for_nonprintable (default: "")
              (Used by LPR) check f and p formats for non_printable characters unless -b (binary)
              or -l (literal) command_line option is supplied. Note that files containing HPGL or
              other printer control languages would often be classed as ``non_printable''.

       connect_grace (default: 0 seconds)
              The  time  to  pause before opening a new connection to a printer.  This allows the
              printer time to recover from the previous job.

       connect_interval (default: 10 (seconds))
              The time to pause after a failed connection or open of the printing  device  before
              attempting a new connection or open.

       connect_timeout (default: 10 (seconds))
              The  time  to  wait  for  a device open or connection to complete.  A zero value is
              infinite timeout.

       retry_nolink (default: true)
              When TRUE and the LPD server is printing or transferring a job, then an  indefinite
              number of attempts to connect to or open the IO device will be made.

       default_banner_printer (default: "")
              The default banner printer program to be used for printing banners.  This should be
              specified in the LPD configuration file.

       default_format (default: "f")
              Default format for printing jobs.

       default_logger_port
              (default: 2001) specifies a  default  port  number  for  logger  information.   See
              logger_destination for details.

       default_logger_protocol
              (default:   UDP)   specifies  a  default  protocol  for  logger  information.   See
              logger_destination for details.

       default_permission (default: ACCEPT)
              Default permission for operations.

       default_printer (default: "")
              The default printer to use if there is no PRINTER environment  variable,  the  user
              has not specified a printer, or there is no printcap information.

       default_priority (default: "A")
              Default priority (class) for printing jobs.  This is also used as the job class.

       default_remote_host (default: "%H")
              The default remote host to use.

       default_tmp_dir (default: /tmp)
              Directory for temporary files.

       domain_name (default: "")
              This  parameter  is  optional,  and  is  appended to the hostname to make it into a
              fully_qualified domain name, ie.  class.iona.ie.  It  will  only  be  used  if  the
              software   cannot   determine   the   domain   name  using  other  means,  such  as
              gethostbyname(3n).

       ff (default: \f)
              Formfeed string.

       filter_ld_path
              (default: ) The value for the environment variable LD_LIBRARY_PATH, both used  when
              executing,  and  passed  on  to  filters.   This  variable  is  used to find shared
              libraries on SunOS, Solaris and Linux.

       filter_options
              (default: "$C $F $H $J $L $P $Q $R $Z $a $c $d $e $f $h $i $j $k $l $n $p $r $s  $w
              $x  $y  $-a")  If  the  "bkf" (backwards compatible filter) flags is not set in the
              printcap entry and the original filter specification does not have  a  `$`  in  it,
              this  option  string is appended to a filter specification, and the string expanded
              with  values  from  the   printcap   information   and   job   information.    (see
              of_filter_options, filter_options, bk_filter_options, bk_of_filter_options)

       filter_path
              (default:  /bin:/usr/bin:/usr/local/bin)  The  value  for  the environment variable
              PATH, both used to find filters and passed on to filters run by lpd and lpr.

       force_poll (default: no)
              Some software packages  put  print  jobs  directly  into  the  spool  queues.   The
              force_poll  flag  forces lpd to periodically poll spool queues looking for jobs and
              no server.  The poll_time variable sets the interval between polls.

       full_time (default: no)
              Use full time and date format in logging and error messages.

       fx (default: "")
              See printcap(5) for details.  This specifies  the  job  formats  allowed  for  this
              queue.

       group (default "daemon")
              The  group  to  use  for file ownership and process permissions.  Used only by lpd;
              this can be the name of a group or a number.  All filters will run as the specified
              group.   Note that if the group value is 0, then the real user group of the process
              at startup will be used.

       kerberos_keytab (default "/etc/lpd.keytab")
              The keytab file to  be  used  by  the  LPD  server  when  using  built-in  kerberos
              authentication.   The  keytab  file  should  be  owned  by  the  LPD server, and be
              readable/writable only by it (i.e. - 600 permissions).

       kerberos_life (default NULL)
              The lifetime of a Kerberos ticket.  NULL selects the default lifetime.  Time should
              be specified using the standard Kerberos time representations.

       kerberos_forward_principal (default NULL)
              remote principal used by server when forwarding

       kerberos_renew (default NULL)
              The  renewal  of  a  Kerberos  ticket.   NULL selects a non-renewable ticket.  Time
              should be specified using the standard Kerberos time representations.

       kerberos_server_principal (default "lpr")
              Server principal used when client sending to server or when server  is  originating
              connection to another server for forwarding.

       kerberos_service (default "lpr")
              The  service  name  used  to  make  requests  to the LPD server when using kerberos
              authentication.  For example, if kerberos_service has the value lpr, the server  is
              on  host  alpha.com,  and  the  kerberos  domain  is  ALPHA.COM,  then the kerberos
              principal name would be:
              lpr/alpha.com@ALPHA.COM.

       la (default: yes)
              See printcap(5) for details.

       lf (default: log)
              Name of the log file.

       lo (default: lock)
              Name of the lock file.

       localhost
              (default "localhost") The name of the localhost entry to be  used  for  the  TCP/IP
              loopback  interface.   The TCP/IP connection may originate from the local host; use
              this name to check to see if the local host address is in the IP address  database,
              and use it as the origination address for local connections.  This is done to avoid
              problems  with  multi-homed  hosts  who  originate   connections   from   different
              interfaces.

       lockfile (default: /var/spool/lpd/lpd)
              The  file  used to indicate the presence of an lpd server running on the host.  The
              lpd_port value is appended to the lockfile value to provide a unique lockfile  even
              when different versions of LPRng are running on the same system.

       logger_destination
              (default:  "") This specifies a destination for logger information generated by the
              lpd   server.    The   formation    of    the    destination    specification    is
              host[%port][,(TCP|UDP)].    For   example,  localhost%2001,UDP  would  send  logger
              information to the localhost IP address, on port 2001 using the UPD protocol.   The
              default    port   and   protocol   are   set   by   the   default_logger_port   and
              default_logger_protocol configuration variables respectively.

       longnumber
              (default: no) RFC1179 requires 3 digit  job  numbers;  setting  longnumber  to  yes
              allows  6  digit  numbers.   If  the backwards_compatible flag is set, only 3 digit
              numbers will be used.

       lpd_listen_port (default: =off) [ipaddr%]port
              The port that lpd binds to.  If the parameter is set  to  off  then  lpd  does  not
              listen to any TCP port.  See lpd_port for details of the format of the argument.

              If this is not set at all, then lpdP will listen on lpd_port.

       lpd_port (default: printer)  [ipaddr%]port
              The  port  that  lpr  and  the  other  client programs send their requests to.  The
              specification has the format ipaddr%port.  If the IP address is  specified  then  a
              bind  to  only  this address and port is done.  If the port value is not a number a
              service lookup is performed  and  the  corresponding  service  port  is  used;  see
              services(5).   This  parameter is useful for debugging a new installation of LPRng,
              in that running LPRng on a different port from the default will not interfere  with
              a previous installation of LPD or LPRng.

       lpd_printcap_path (default: "")
              The location of lpd server only printcap database information.  If this is nonblank
              the printcap_pathP will not be used by the lpd server.

       mail_operator_on_error (default: "")
              Put this person on the CC-list of the mail, if it is not a  success  mail.  (So  in
              addition  to  the  person who made the printer request, also this person gets error
              messages, but no success messages.)

       max_status_line (default: 79)
              An integer value specifying the numbers of characters to  be  used  for  displaying
              simple  job  status;   this  includes  the  queue  position,  job  identifier,  job
              contents, size, and time.  A 0 (zero) value indicates no restrictions.

       max_status_size (default: 10 (Kbytes))
              An integer value specifying (in K bytes) the maximum size of the status file to  be
              generated  during printing operations.  A 0 value will create unlimited size status
              files.  When the file size exceeds this value, it is truncated to min_status_size K
              bytes.

       mc (default: 1)
              See printcap(5) for details.

       min_status_size (default: 0 (Kbytes))
              Minimum status size.  If 0, defaults to 20 percent of max_status_size.

       minfree (default: 0)
              The  amount  of free space (in Kbytes) needed in the spool directory in order for a
              job to be accepted.  If 0, there is no limit; if the parameter is  the  name  of  a
              file rather than a number, the file must contain a numerical minimum free value (in
              Kbytes).  This value is overridden by the printcap mi field value.

       ms_time_resolution
              (default: FALSE) This flag causes the time information to be printed to millisecond
              accuracy.  This is overkill for most purposes.

       of_filter_options
              (default:  "")  If  this  is  not  set,  the  value  defaults  to  the  same as the
              filter_options value.  This string is appended to a OF  filter  specification,  and
              the  string expanded with values from the printcap information and job information.
              If the "bkf" (backwards compatible filter) flags is set in the printcap  entry,  of
              bk_of_filter_options    value   is   appended   instead   (see   of_filter_options,
              filter_options, bk_filter_options, bk_of_filter_options)

       originate_port
              (default: "721 731") A range of port numbers  to  originate  requests  from.   When
              sending  service requests, the software will try to open and bind to these ports to
              originate a request to a server.  If no port is given,  or  all  of  the  requested
              ports  are  unavailable or cannot be bound to, then a normal use port is requested.
              Note that on UNIX systems, if a port in the range 0-1023 is requested the  EUID  of
              the  process  must  be  root  for  the  request  to  be granted.  Note that RFC1179
              specifies that requests must originate from ports in the range 721-731.

       pass_env
              (default:                 "LANG,LC_CTYPE,LC_NUMERIC,LC_TIME,LC_COLLATE,LC_MONETARY,
              LC_MESSAGES,LC_PAPER,LC_NAME,LC_ADDRESS,LC_TELEPHONE,LC_MEASUREMENT,
              LC_IDENTIFICATION,LC_ALL") Client programs such as LPR, LPC, etc., will pass  these
              environment variables to any filter programs they start.

       poll_time (default: 6000)
              Interval  in seconds at which LPD checks for queues with jobs and no server active.
              See force_poll as well.

       pl (default: 66)
              See printcap(5) for details.

       pr (default: /bin/pr)
              See printcap(5) for details.

       printcap_path
              (default: "/etc/printcap") The location of the printcap database file.  If  a  file
              or  filter  does  not  exist, it is considered a fatal error.  All valid entries in
              these files will be used.  See PRINTCAP LOOKUP for details.

       perms_path
              (default:   /etc/lpd.perms:/usr/etc/lpd.perms:   /var/spool/lpd/lpd.perms.%h)   The
              location  of the printer permissions database.  If a file or filter does not exist,
              it is skipped.  The first file or filter that exists and is readable will be  used.
              See PERMISSIONS LOOKUP for details.

       pw (default: 80)
              See printcap(5) for details.

       save_on_error
              (default: no) Save a job in the spool queue if it has an error rather than removing
              it.

       save_when_done
              (default: no) Save a job in the spool queue after completion rather  than  removing
              it.

       send_data_first
              (default: no) Send data files of a job first, followed by the control file.

       send_failure_action (default: "")
              The  lpd  server  uses this to determine the action to take when unable to print or
              process a job.  The keyword abort will cause it to  terminate  operations,  leaving
              the  job  in the queue, remove will cause it to remove the job, retry will cause it
              to retry the job, and hold will cause it to hold the job with an error  indication.
              If  the  value  is a filter, then the filter will be invoked and the exit status of
              the filter used to determine the actions.

       send_job_rw_timeout (default: 6000)
              When printing or sending a job to a remote printer, use this  as  a  write  to  the
              device  or  remote  host timeout value.  If a timeout occurs, then a FAIL status is
              returned and the send_failure_action value is used  to  determine  what  to  do  on
              failure.

       send_try (default: 3)
              Numbers  of  times  to  try to send a job to the printer or remote host.  A 0 value
              means an infinite number of times.

       sendmail (default: "/usr/lib/sendmail -oi -t")
              If the argument is empty then all  mail_related  functionality  is  disabled.   The
              arguments  are  the command to run when mail is to be sent.  The command used needs
              to be able to accept the message on stdin, with no  arguments.   The  message  will
              contain the To:, From:, Cc: and Subject: headers.

       server_tmp_dir (default: /tmp)
              Temporary dir for the server.

       spool_dir_perms (default: 042700)
              Permissions of the spool directories.

       spool_file_perms (default: 0600)
              Permissions of the spool files.

       syslog_device (default: /dev/console)
              Log to this device if all else fails.

       unix_socket_path (default: /var/run/lprng/socket)
              Location  of  the  Unix  socket  that  lpd  listens on and LPRng clients attempt to
              communicate to when host  is  localhost.  Set  to  off  to  disable  listening  and
              connecting via a Unix socket.

       use_date (default: no)
              No information about this parameter available.

       use_identifier (default: no)
              Add  a  job identifier line to the control file, using the 'A' entry in the control
              file.

       use_info_cache (default: yes)
              If this is set to yes, lpd.perms and printcap information lookups  will  be  cached
              for  later  use.  Only lookups in the main databases will be cached, not lookups in
              the per_printer databases.  You can force the lpd to flush its cache and reread the
              permissions file by sending it a SIGHUP.

       use_queuename (default: no)
              Put  an entry into control files identifying the spool queue the job was originally
              sent to.  The entry has the form 'Qspoolname', and  its  value  can  be  passed  to
              filters.   This  is  useful  for  setting  up  a  spool queue which formats jobs in
              different ways, depending on the name of the queue.

       use_shorthost (default: no)
              By default, names of lpr job files used the originating host fully qualified domain
              name.  This can exceed 14 characters, the limit of file names on some UNIX systems.
              If this is set to yes, the non-qualified name will be used, and if the host name is
              at most 8 characters the file name will be at most 14 characters long.

       user (default: daemon)
              The  user  that lpd and its filters runs as, and the owner of the spool directories
              and other lpd_writable files.  This can be the name of a user or a number.  If  the
              user  value is 0, then the real UID of the program when started will be used.  This
              allows a non_root user to test the functionality of the LRPng software.

PRINTCAP LOOKUP, DATABASE FILES AND FILTERS

       The printcap_path and printer_perms_path variables specify a  list  of  either  data  base
       files  or  filters  to  use  to  get printcap or permission entries for a printer.  To get
       information, the filter is started and a single line with the printer name is sent to  it.
       Note  that  the printer name all is used to request information either about all printers,
       or a specific printer entry that has a list of all printers.   See  printcap(5)  for  more
       details.

       To find the printcap information, LPRng programs will read the database files specified in
       the printcap_path entry.  The lpd server will read any additional files specified  in  the
       lpd_printcap_path  entry.   If  any  of the files is missing or non-readable a fatal error
       will result.  After having searched the various files, if a filter has been specified  the
       filter  will  be  started  and  the required printer name will be sent to the filter.  The
       output from the filter will be used as the printcap information.

SECURITY-RELATED PARAMETERS

       Environment variables are sanitized  by  lpd  and  the  other  executables,  in  that  the
       variables  IFS,  LD_PRELOAD  and LD_PROFILE are all deleted from the environment passed to
       filters and any other sub_processes.  For more  reliability,  script  filters  should  set
       their own PATH and LD_LIBRARY_PATH variables.

       All filters will run as the user and group specified by the group and user variables.

EXAMPLE

       # lpd.conf generated from  on Wed Apr  7 07:59:48 PDT 1999

       #   The values in this file are the default values.
       #   If you modify the file,  set the value to something other than the default
       #   For example, '# default force_localhost' means
       #     the 'force_localhost' option value is on or 1.
       #   Uncomment this and change it to read 'force_localhost@'

       # Purpose: always print banner, ignore lpr -h option
       #   default ab@
       # Purpose: query accounting server when connected
       #   default achk@
       # Purpose: accounting at end (see also af, la, ar, as)
       #   default ae=jobend $H $n $P $k $b $t
       # Purpose: name of accounting file (see also la, ar)
       #   default af=
       af=acct
       # Purpose: automatically hold all jobs
       #   default ah@
       ah
       # Purpose: Allow duplicate command line arguments (legacy requirement)
       #   default allow_duplicate_args@

FILES

       The  files  used  by  LPRng  are  set  by  values  in the printer configuration file.  The
       following are a commonly used set of default values.
       /etc/lprng/lpd.conf                          LPRng configuration file
       ${HOME}/.printcap                            user printer description file
       /etc/printcap                                printer description file
       /etc/lprng/lpd.perms                         permissions
       /var/run/lprng/lpd                           lock file for queue control
       /var/spool/lpd                               spool directories
       /var/spool/lpd/QUEUE/control                 queue control
       /var/spool/lpd/QUEUE/log                     trace or debug log file
       /var/spool/lpd/QUEUE/acct                    accounting file
       /var/spool/lpd/QUEUE/status                  status file

SEE ALSO

       lpc(8), lpd(8), checkpc(8), lpr(1), lpq(1),  lprm(1),  printcap(5),  lpd.perms(5),  pr(1),
       lprng_certs(1), lprng_index_certs(1).

DIAGNOSTICS

       Most of the diagnostics are self explanatory.
       If you are puzzled over the exact cause of failure,
       set the debugging level on (-D5) and run again.
       The debugging information will
       help you to pinpoint the exact cause of failure.

HISTORY

       LPRng  is a enhanced printer spooler system with functionality similar to the Berkeley LPR
       software.  The LPRng mailing list is lprng@lprng.com; subscribe by sending mail to  lprng-
       request@lprng.com  with  the  word  subscribe in the body.  The software is available from
       ftp://ftp.lprng.com/pub/LPRng.

AUTHOR

       Patrick Powell <papowell@lprng.com>.